4 ms·
Pardon my ignorance, but why wouldn't this work? Suppose you were red-green colorblind, and there was an apple tree with green "Granny Smith" apples outside yo
by ksmiley 14y ago
Pardon my ignorance, but why wouldn't this work?
Suppose you were red-green colorblind, and there was an apple tree with green "Granny Smith" apples outside your window.
You can't tell if the leaves on the tree are red or green, but using common sense, you guess that they are green, and color them with the green pencil.
You can't tell if the apples are red or green, but using common sense, you guess that they are red, and color them with the red pencil.
"Ah ha", says your friend, "you colored the apples with red when they are actually green. You must be red-green colorblind"
- vhf 14y agoThat's how they discovered I was colorblind : When I was in kindergarten, the teacher gave us the assignment of drawing a brown bear. Mine was green.
- albertoavila 14y agoSome color blind people are more affected than others on their same color blind group. In my experience doing an Ishihara test (http://en.wikipedia.org/wiki/Color_perception_test http://en.wikipedia.org/wiki/Color_perception_test) whith someone else while telling them what are you seeing on each pod does wonders to make them understand specifically what shades of color cause you troubles, that's how my wife got to understand my color blindess.
- deleted 14y ago[deleted]
- jwhite 14y agoThere's also the fact that the ability to discern two colours depends on the two shades involved, and the shades that nature presents are probably different to the ones chosen by Faber-Castell. Also, when I was a kid I could tell the purple pencil from the blue if I held them together, but had trouble if I had just one on its own. (Still true today but I don't come across colour pencils so often...)
- untog 14y agoActually I am exactly the same. Inspired by all of this, I took an online test: http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php http://www.opticien-lentilles.com/daltonien_beta/new_test_da... Which seems to suggest that I am green-blind, but not red. With 1/7 wickline, but I have no idea what that means (suspect it has been lost in translation somewhere)
- LinaLauneBaer 14y agoThis test seems to be flawed. I just did this test with four people and we all agreed that their correct solutions are sometimes wrong. Is an expert here?
- LinaLauneBaer 14y agoOr am I color blind? http://db.tt/0zOpPIV2 http://db.tt/0zOpPIV2
- untog 14y agoHm, something appears to have gone very wrong there, yes. That image is not supposed to be paired with those answers.
- untog 14y agoSorry, I edited my post to reflect the fact that I misrepresented the scenario. Though it started as a discussion about colour-blindness, it developed into a more general "what if my blue is your red" discussion. In that scenario, the red and greens on the tree would be matched exactly to the reds and greens on the pencils- there's no way to know if I'm seeing something different.